﻿.backBox {
    position: absolute;
    top: 11px;
    left: 6%;
    font-size: 18px;
}

.topTitle {
    width: 100%;
    height: 45px;
    line-height: 45px;
    text-align: center;
    font-size: 6vw;
    background-color: #f8f8f8
}
.userNumber {
    width: 70%;
    margin: 0 auto;
    margin-top: 10px;
}
    .userNumber > input {
        float: left;
        width: 70%;
    }

    .userNumber > button {
        float: right;
    }